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0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></g></svg><span>2022年3月1日</span><meta property="datePublished" content="2022-03-01T10:16:51.000Z"></span><!----><span class="words-info" arialabel="字数🔠" isoriginal="false" pageview="false" color="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon word-icon" viewbox="0 0 1024 1024" arialabelledby="word"><title id="word" lang="en">word icon</title><g fill="currentColor"><path d="M518.217 432.64V73.143A73.143 73.143 0 01603.43 1.097a512 512 0 01419.474 419.474 73.143 73.143 0 01-72.046 85.212H591.36a73.143 73.143 0 01-73.143-73.143z"></path><path d="M493.714 566.857h340.297a73.143 73.143 0 0173.143 85.577A457.143 457.143 0 11371.566 117.76a73.143 73.143 0 0185.577 73.143v339.383a36.571 36.571 0 0036.571 36.571z"></path></g></svg><span>约 1308 字</span><meta property="wordCount" content="1308"></span></div><hr></div><div class="toc-place-holder"><aside id="toc-list"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/java/new-features/java11.html#http-client-标准化" class="router-link-active router-link-exact-active toc-link level2">HTTP Client 标准化</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/java/new-features/java11.html#string-增强" class="router-link-active router-link-exact-active toc-link level2">String 增强</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/java/new-features/java11.html#optional-增强" class="router-link-active router-link-exact-active toc-link level2">Optional 增强</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/java/new-features/java11.html#zgc-可伸缩低延迟垃圾收集器" class="router-link-active router-link-exact-active toc-link level2">ZGC(可伸缩低延迟垃圾收集器)</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/java/new-features/java11.html#lambda-参数的局部变量语法" class="router-link-active router-link-exact-active toc-link level2">Lambda 参数的局部变量语法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/java/new-features/java11.html#启动单文件源代码程序" class="router-link-active router-link-exact-active toc-link level2">启动单文件源代码程序</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/java/new-features/java11.html#其他" class="router-link-active router-link-exact-active toc-link level2">其他</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/java/new-features/java11.html#参考" class="router-link-active router-link-exact-active toc-link level2">参考</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><!--[--><p><strong>Java 11</strong> 于 2018 年 9 月 25 日正式发布，这是很重要的一个版本！Java 11 和 2017 年 9 月份发布的 Java 9 以及 2018 年 3 月份发布的 Java 10 相比，其最大的区别就是：在长期支持(Long-Term-Support)方面，<strong>Oracle 表示会对 Java 11 提供大力支持，这一支持将会持续至 2026 年 9 月。这是据 Java 8 以后支持的首个长期版本。</strong></p><p><img src="https://img-blog.csdnimg.cn/20210603202746605.png" alt="" loading="lazy"></p><p><strong>概览（精选了一部分）</strong> ：</p><ul><li><a href="https://openjdk.java.net/jeps/321" target="_blank" rel="noopener noreferrer">JEP 321：HTTP Client 标准化<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://openjdk.java.net/jeps/333" target="_blank" rel="noopener noreferrer">JEP 333：ZGC(可伸缩低延迟垃圾收集器)<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://openjdk.java.net/jeps/323" target="_blank" rel="noopener noreferrer">JEP 323：Lambda 参数的局部变量语法<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://openjdk.java.net/jeps/330" target="_blank" rel="noopener noreferrer">JEP 330：启动单文件源代码程序<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><h2 id="http-client-标准化" tabindex="-1"><a class="header-anchor" href="#http-client-标准化" aria-hidden="true">#</a> HTTP Client 标准化</h2><p>Java 11 对 Java 9 中引入并在 Java 10 中进行了更新的 Http Client API 进行了标准化，在前两个版本中进行孵化的同时，Http Client 几乎被完全重写，并且现在完全支持异步非阻塞。</p><p>并且，Java 11 中，Http Client 的包名由 <code>jdk.incubator.http</code> 改为<code>java.net.http</code>，该 API 通过 <code>CompleteableFuture</code> 提供非阻塞请求和响应语义。使用起来也很简单，如下：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">var</span> request <span class="token operator">=</span> <span class="token class-name">HttpRequest</span><span class="token punctuation">.</span><span class="token function">newBuilder</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
    <span class="token punctuation">.</span><span class="token function">uri</span><span class="token punctuation">(</span>URI<span class="token punctuation">.</span><span class="token function">create</span><span class="token punctuation">(</span><span class="token string">&quot;https://javastack.cn&quot;</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
    <span class="token punctuation">.</span><span class="token function">GET</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
    <span class="token punctuation">.</span><span class="token function">build</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">var</span> client <span class="token operator">=</span> <span class="token class-name">HttpClient</span><span class="token punctuation">.</span><span class="token function">newHttpClient</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

<span class="token comment">// 同步</span>
<span class="token class-name">HttpResponse</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">&gt;</span></span> response <span class="token operator">=</span> client<span class="token punctuation">.</span><span class="token function">send</span><span class="token punctuation">(</span>request<span class="token punctuation">,</span> <span class="token class-name">HttpResponse<span class="token punctuation">.</span>BodyHandlers</span><span class="token punctuation">.</span><span class="token function">ofString</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>response<span class="token punctuation">.</span><span class="token function">body</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

<span class="token comment">// 异步</span>
client<span class="token punctuation">.</span><span class="token function">sendAsync</span><span class="token punctuation">(</span>request<span class="token punctuation">,</span> <span class="token class-name">HttpResponse<span class="token punctuation">.</span>BodyHandlers</span><span class="token punctuation">.</span><span class="token function">ofString</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
    <span class="token punctuation">.</span><span class="token function">thenApply</span><span class="token punctuation">(</span><span class="token class-name">HttpResponse</span><span class="token operator">::</span><span class="token function">body</span><span class="token punctuation">)</span>
    <span class="token punctuation">.</span><span class="token function">thenAccept</span><span class="token punctuation">(</span><span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token operator">::</span><span class="token function">println</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br></div></div><h2 id="string-增强" tabindex="-1"><a class="header-anchor" href="#string-增强" aria-hidden="true">#</a> String 增强</h2><p>Java 11 增加了一系列的字符串处理方法：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token comment">//判断字符串是否为空</span>
<span class="token string">&quot; &quot;</span><span class="token punctuation">.</span><span class="token function">isBlank</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span><span class="token comment">//true</span>
<span class="token comment">//去除字符串首尾空格</span>
<span class="token string">&quot; Java &quot;</span><span class="token punctuation">.</span><span class="token function">strip</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span><span class="token comment">// &quot;Java&quot;</span>
<span class="token comment">//去除字符串首部空格</span>
<span class="token string">&quot; Java &quot;</span><span class="token punctuation">.</span><span class="token function">stripLeading</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>   <span class="token comment">// &quot;Java &quot;</span>
<span class="token comment">//去除字符串尾部空格</span>
<span class="token string">&quot; Java &quot;</span><span class="token punctuation">.</span><span class="token function">stripTrailing</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>  <span class="token comment">// &quot; Java&quot;</span>
<span class="token comment">//重复字符串多少次</span>
<span class="token string">&quot;Java&quot;</span><span class="token punctuation">.</span><span class="token function">repeat</span><span class="token punctuation">(</span><span class="token number">3</span><span class="token punctuation">)</span><span class="token punctuation">;</span>             <span class="token comment">// &quot;JavaJavaJava&quot;</span>
<span class="token comment">//返回由行终止符分隔的字符串集合。</span>
<span class="token string">&quot;A\nB\nC&quot;</span><span class="token punctuation">.</span><span class="token function">lines</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">count</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>    <span class="token comment">// 3</span>
<span class="token string">&quot;A\nB\nC&quot;</span><span class="token punctuation">.</span><span class="token function">lines</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">collect</span><span class="token punctuation">(</span><span class="token class-name">Collectors</span><span class="token punctuation">.</span><span class="token function">toList</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br></div></div><h2 id="optional-增强" tabindex="-1"><a class="header-anchor" href="#optional-增强" aria-hidden="true">#</a> Optional 增强</h2><p>新增了<code>empty()</code>方法来判断指定的 <code>Optional</code> 对象是否为空。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">var</span> op <span class="token operator">=</span> <span class="token class-name">Optional</span><span class="token punctuation">.</span><span class="token function">empty</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>op<span class="token punctuation">.</span><span class="token function">isEmpty</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span><span class="token comment">//判断指定的 Optional 对象是否为空</span>
</code></pre><div class="line-numbers" aria-hidden="true"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div><h2 id="zgc-可伸缩低延迟垃圾收集器" tabindex="-1"><a class="header-anchor" href="#zgc-可伸缩低延迟垃圾收集器" aria-hidden="true">#</a> ZGC(可伸缩低延迟垃圾收集器)</h2><p><strong>ZGC 即 Z Garbage Collector</strong>，是一个可伸缩的、低延迟的垃圾收集器。</p><p>ZGC 主要为了满足如下目标进行设计：</p><ul><li>GC 停顿时间不超过 10ms</li><li>即能处理几百 MB 的小堆，也能处理几个 TB 的大堆</li><li>应用吞吐能力不会下降超过 15%（与 G1 回收算法相比）</li><li>方便在此基础上引入新的 GC 特性和利用 colored 针以及 Load barriers 优化奠定基础</li><li>当前只支持 Linux/x64 位平台</li></ul><p>ZGC 目前 <strong>处在实验阶段</strong>，只支持 Linux/x64 平台。</p><p>与 CMS 中的 ParNew 和 G1 类似，ZGC 也采用标记-复制算法，不过 ZGC 对该算法做了重大改进。</p><p>在 ZGC 中出现 Stop The World 的情况会更少！</p><p>详情可以看 ： <a href="https://tech.meituan.com/2020/08/06/new-zgc-practice-in-meituan.html" target="_blank" rel="noopener noreferrer">《新一代垃圾回收器 ZGC 的探索与实践》<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><h2 id="lambda-参数的局部变量语法" tabindex="-1"><a class="header-anchor" href="#lambda-参数的局部变量语法" aria-hidden="true">#</a> Lambda 参数的局部变量语法</h2><p>从 Java 10 开始，便引入了局部变量类型推断这一关键特性。类型推断允许使用关键字 var 作为局部变量的类型而不是实际类型，编译器根据分配给变量的值推断出类型。</p><p>Java 10 中对 var 关键字存在几个限制</p><ul><li>只能用于局部变量上</li><li>声明时必须初始化</li><li>不能用作方法参数</li><li>不能在 Lambda 表达式中使用</li></ul><p>Java11 开始允许开发者在 Lambda 表达式中使用 var 进行参数声明。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token comment">// 下面两者是等价的</span>
<span class="token class-name">Consumer</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">&gt;</span></span> consumer <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token keyword">var</span> i<span class="token punctuation">)</span> <span class="token operator">-&gt;</span> <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>i<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">Consumer</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">&gt;</span></span> consumer <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token class-name">String</span> i<span class="token punctuation">)</span> <span class="token operator">-&gt;</span> <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>i<span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><h2 id="启动单文件源代码程序" tabindex="-1"><a class="header-anchor" href="#启动单文件源代码程序" aria-hidden="true">#</a> 启动单文件源代码程序</h2><p>这意味着我们可以运行单一文件的 Java 源代码。此功能允许使用 Java 解释器直接执行 Java 源代码。源代码在内存中编译，然后由解释器执行，不需要在磁盘上生成 <code>.class</code> 文件了。唯一的约束在于所有相关的类必须定义在同一个 Java 文件中。</p><p>对于 Java 初学者并希望尝试简单程序的人特别有用，并且能和 jshell 一起使用。一定能程度上增强了使用 Java 来写脚本程序的能力。</p><h2 id="其他" tabindex="-1"><a class="header-anchor" href="#其他" aria-hidden="true">#</a> 其他</h2><ul><li><strong>新的垃圾回收器 Epsilon</strong> ：一个完全消极的 GC 实现，分配有限的内存资源，最大限度的降低内存占用和内存吞吐延迟时间</li><li><strong>低开销的 Heap Profiling</strong> ：Java 11 中提供一种低开销的 Java 堆分配采样方法，能够得到堆分配的 Java 对象信息，并且能够通过 JVMTI 访问堆信息</li><li><strong>TLS1.3 协议</strong> ：Java 11 中包含了传输层安全性（TLS）1.3 规范（RFC 8446）的实现，替换了之前版本中包含的 TLS，包括 TLS 1.2，同时还改进了其他 TLS 功能，例如 OCSP 装订扩展（RFC 6066，RFC 6961），以及会话散列和扩展主密钥扩展（RFC 7627），在安全性和性能方面也做了很多提升</li><li><strong>飞行记录器(Java Flight Recorder)</strong> ：飞行记录器之前是商业版 JDK 的一项分析工具，但在 Java 11 中，其代码被包含到公开代码库中，这样所有人都能使用该功能了。</li><li>......</li></ul><h2 id="参考" tabindex="-1"><a class="header-anchor" href="#参考" aria-hidden="true">#</a> 参考</h2><ul><li>JDK 11 Release Notes：https://www.oracle.com/java/technologies/javase/11-relnote-issues.html</li><li>Java 11 – Features and Comparison： <a href="https://www.geeksforgeeks.org/java-11-features-and-comparison/" target="_blank" rel="noopener noreferrer">https://www.geeksforgeeks.org/java-11-features-and-comparison/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><!--]--></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/Snailclimb/JavaGuide/edit/main/docs/java/new-features/java11.md" rel="noopener noreferrer" target="_blank" arialabel="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" arialabelledby="edit"><title id="edit" lang="en">edit icon</title><g fill="currentColor"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></g></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/3/1 18:16:51</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: koushuangbwcx@163.com">guide</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/java/new-features/java10.html" class="nav-link prev" arialabel="Java 10 新特性概览"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->Java 10 新特性概览</div></a><a href="/java/new-features/java12-13.html" class="nav-link next" arialabel="Java 12 ~ 13 新特性概览"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">Java 12 ~ 13 新特性概览<!----></div></a></nav><!----><!----></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">鄂ICP备2020015769号-1</a></div><div class="copyright">Copyright © 2022 Guide</div></footer></div><!--]--><!----><!--]--></div>
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